Bought so many 1 day passes till I realized I almost spent enough for the whole season pass. So I went ahead and got the 30 day pass for around $30 (there was an OPUS+BIXI deal so I got it for $16 instead.)
Pros:
VERY practical and VERY addicting!
Cons:
You have to park the bixi at any station before your 30 mins (or 45 mins if you are a member) is up. Then wait 2 minutes before you can take out another one.
Too many damaged bikes! Either something small like the bell not working or something big like loose chain, flat tire or loose breaks.
Still worth it though!